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Diffstat (limited to 'newlib/libc/string/strchr.c')
-rw-r--r--newlib/libc/string/strchr.c108
1 files changed, 0 insertions, 108 deletions
diff --git a/newlib/libc/string/strchr.c b/newlib/libc/string/strchr.c
deleted file mode 100644
index de4585f75..000000000
--- a/newlib/libc/string/strchr.c
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
-FUNCTION
- <<strchr>>---search for character in string
-
-INDEX
- strchr
-
-ANSI_SYNOPSIS
- #include <string.h>
- char * strchr(const char *<[string]>, int <[c]>);
-
-TRAD_SYNOPSIS
- #include <string.h>
- char * strchr(<[string]>, <[c]>);
- char *<[string]>;
- int *<[c]>;
-
-DESCRIPTION
- This function finds the first occurence of <[c]> (converted to
- a char) in the string pointed to by <[string]> (including the
- terminating null character).
-
-RETURNS
- Returns a pointer to the located character, or a null pointer
- if <[c]> does not occur in <[string]>.
-
-PORTABILITY
-<<strchr>> is ANSI C.
-
-<<strchr>> requires no supporting OS subroutines.
-
-QUICKREF
- strchr ansi pure
-*/
-
-#include <string.h>
-#include <limits.h>
-
-/* Nonzero if X is not aligned on a "long" boundary. */
-#define UNALIGNED(X) ((long)X & (sizeof (long) - 1))
-
-/* How many bytes are loaded each iteration of the word copy loop. */
-#define LBLOCKSIZE (sizeof (long))
-
-#if LONG_MAX == 2147483647L
-#define DETECTNULL(X) (((X) - 0x01010101) & ~(X) & 0x80808080)
-#else
-#if LONG_MAX == 9223372036854775807L
-/* Nonzero if X (a long int) contains a NULL byte. */
-#define DETECTNULL(X) (((X) - 0x0101010101010101) & ~(X) & 0x8080808080808080)
-#else
-#error long int is not a 32bit or 64bit type.
-#endif
-#endif
-
-/* DETECTCHAR returns nonzero if (long)X contains the byte used
- to fill (long)MASK. */
-#define DETECTCHAR(X,MASK) (DETECTNULL(X ^ MASK))
-
-char *
-_DEFUN (strchr, (s1, i),
- _CONST char *s1 _AND
- int i)
-{
- _CONST unsigned char *s = (_CONST unsigned char *)s1;
-#if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__)
- unsigned char c = (unsigned int)i;
-
- while (*s && *s != c)
- {
- s++;
- }
-
- if (*s != c)
- {
- s = NULL;
- }
-
- return (char *) s;
-#else
- unsigned char c = (unsigned char)i;
- unsigned long mask,j;
- unsigned long *aligned_addr;
-
- if (!UNALIGNED (s))
- {
- mask = 0;
- for (j = 0; j < LBLOCKSIZE; j++)
- mask = (mask << 8) | c;
-
- aligned_addr = (unsigned long*)s;
- while (!DETECTNULL (*aligned_addr) && !DETECTCHAR (*aligned_addr, mask))
- aligned_addr++;
-
- /* The block of bytes currently pointed to by aligned_addr
- contains either a null or the target char, or both. We
- catch it using the bytewise search. */
-
- s = (unsigned char*)aligned_addr;
- }
-
- while (*s && *s != c)
- s++;
- if (*s == c)
- return (char *)s;
- return NULL;
-#endif /* not PREFER_SIZE_OVER_SPEED */
-}